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Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
...
In order to run the python script, we need to tell the shell three things:
That the file is a script
Which interpreter we want to execute the script
The path of said interpreter
The shebang #! accomplishes (1.). The shebang ...
How do you make a deep copy of an object?
...copy constructor. Obvious but might be overlooked.
Example:
public class Order {
private long number;
public Order() {
}
/**
* Copy constructor
*/
public Order(Order source) {
number = source.number;
}
}
public class Customer {
private String nam...
Metadata file '.dll' could not be found
...boxes are checked, uncheck them, check again and try to build again.
Build Order and Project Dependencies:
Go to 'Solution Explorer'. Right click on Solution. Go to 'Project Dependencies...'. You will see two tabs: 'Dependencies' and 'Build Order'. This build order is the one in which solution buil...
Jump to matching XML tags in Vim
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There is a vim plugin called matchit.vim . You can find it here: http://www.vim.org/scripts/script.php?script_id=39 . It was created pretty much the exact purpose you describe.
Install that, place your cursor on the body of the tag (not the <&g...
What is the difference between bottom-up and top-down?
...nces: {Web: 1,2} {Literature: 5}
Recap
Dynamic programming is all about ordering your computations in a way that avoids recalculating duplicate work. You have a main problem (the root of your tree of subproblems), and subproblems (subtrees). The subproblems typically repeat and overlap.
For exam...
Best GWT widget library? [closed]
...heir support are poor at best.
How to look for widgets should follow this order:
First check GWT Incubator to see if
there's what I'm looking for.
http://code.google.com/p/google-web-toolkit-incubator/
Then, if you are looking for
something "cooler" check GWT Mosaic
http://code.google.com/p/gwt-m...
MySQL with Node.js
...de.js. I come from a PHP background, so I'm fairly used to using MySQL for all my database needs.
9 Answers
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What's the idiomatic syntax for prepending to a short python list?
... element will be prepended one at a time, thus effectively reversing their order.
Performance of list versus deque
First we setup with some iterative prepending:
import timeit
from collections import deque
def list_insert_0():
l = []
for i in range(20):
l.insert(0, i)
def list_s...
IIS7 Permissions Overview - ApplicationPoolIdentity
...
ApplicationPoolIdentity is actually the best practice to use in IIS7+. It is a dynamically created, unprivileged account. To add file system security for a particular application pool see IIS.net's "Application Pool Identities". The quick version:
If the ...
Query EC2 tags from within instance
...des them, or add an apt or yum command at the beginning of the script.
In order to access EC2 tags you need a policy like this one in your instance's IAM role:
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "Stmt1409309287000",
"Effect": "Allow",
"Action": [
"...